Beater for paper stock



Nov. 13,1928. I 1,691,308

C. R. SEABORNE BEATER FOR PAPER STOCK Filed Aug. 5, 1925 2 Sheets-Sheetl (Zwissfl. Sea/50 2 I Z: 1 $1 d Nov. 13, 1928. 1,691,308

' C. R. SEABORNE HEATER FOR PAPER STOCK Filed Aug. 5, 1925 2Sheets-Sheet 2 Patented Nov. 13, 1928.

UNITED STATES CHARLES R. SEAIBDRNE, OF APPLETON, WISCONSIN.

BEATER FOR PAPER STOCK.

Application filed August 5, 1925. Serial No. 48,217.

The present invention has for its object to provide an improved beaterwhereby the reduction and refining of paper stock can be moreefiectively accomplished, and the invention consists in the features ofnovelty hereinafter described, illustrated in the accompanying drawingsand particularly pointed out in the claims at the end of thisspecification.

Figure 1 is a plan view of a heater embodying my invention; Figure 2 isa View in vertical section on line 2-2 of Fig. 1; Figure 3 is a view insection on line 3-3 of Fig. 2,

parts being shown in elevation; Figure 4 is a detail View in horizontalsection on line 4% of Fig. 2; Figure 5 is a detail view in elevation ofthe bowl-adjusting means; Fig ure 6 is an inverted plan view of therevoluble plate; and Figure 7 is an inverted detail plan View showinggroups of knives on the bottom of the bowl.

My improved beater comprises a rotary plate or element A, and astationary bowl or element B, that are mounted within the inclosing tankC, preferably of circular construction. The plate A, which is shown ofdisk form, is preferably a casting raised at the center and taperingdownwardly and outwardly towards its periphery. The plate A is fixedupon the upper end of a drive shaft 10 having a reduced threaded portion11 to receive a correspondingly threadedeap 12,

the outer surface of which is inclined to correspond with the curvatureof the upper face of. the plate A. The shaft 10 passes through astuffing box 14: and through a bearing 15,

these parts being suitably sustained beneath the tank C, and the lowerend of the shaft is mounted in a step-bearing 16 of suitableconstruction. On the lower portion of the shaft 10 is mounted a suitabledrive gear or pulley 17 whereby rotation of the shaft may be effected.To the under side of the-plate A are fixed suitable metal strips 20 thatare preferably curved as indicated in Fig. 6 of the drawings, thesestrips serving, when the plate is driven, to throw outwardly anymaterial that might tend to lodge between the under face of the-plateand the bottom of the tank 50 C. Near its periphery, the upper face ofthe plate is provided with an annular set of knives a that arepreferably set within an annular seat or recess a in the upper face ofthe plate. As shown, these knives a are arranged at an angle to theradius of the plate and are adapted to cooperate with the knives on thebowl, to be presently described. The portion of the upper face of theplate A within the set of knives is formed or provided with a pluralityof arms or blades a that may be formed integra with the plate. Theperipheral ortions 0 these arms or blades (1 where su jected to thegreatest wear, are shown as provided with detachable wearing plates aconnected, as by screws, to the arms or blades (1 The preferred form ofthe arms or blades a is as indicated in the drawing (see Fig. 3) that isto say, each arm or blade has its forward surface somewhat moregradually inclined than its rear surface, the blades increasing inelevation from the center towards the periphery of the plate.

As shown, the bowl B is of general concavo convex, annular shape, itsbottom being formed and closed by the plate A and its top being leftopen to receive the stock and per mit the circulation of the pulp overthe inwardly turned edge of the top, as will herein- 1 after more fullyappear. For convenience of construction, the bowl is formed of upper andlower sections having flanged meeting edges adapted to interlock. Theupper face of the lower portion of the bowl is formed or provided with aplurality of humps or offsets 6 (see Figs. 2 and 3) adapted to cooperatewith the blades or arms ofiof the plate, as will hereinafter more fullyappear, these offsets having preferably inclined sides, as shown. Theupper and lower portions of the bowl are provided preferably at threepoints with lugs or offsets b, towhich are bolted, as at b, the slideblocks 25, these slide blocks having vertical ribs 26 adapted to move inways or channels formed in the side walls of castings 27 that are boltedto the.

wall of the tank C. Through a vertical hole formed in each of the slideblocks 25 is passed a rod 28 to which the corresponding slideblock isconnected by nuts 29 engaging threaded portions of the rod 28. The upperend of each rod 28 passes through a bracket 30 bolted to the tank C nearitstop, the rods 28 passing also through holes in the top plate 0 of thetank. rod 28 is encircled by one or more springs or cushions whereby thebowl may be yieldingly supported. As shown, each rod 28 passes throughtwo rubber cushions 31 and 32, these cushions being inclosed withinperforated.

disk-shaped plates 33'. Between the cushions 31 and 32 is placed athreaded adjusting nut 34, the construction of which will here- Theupper portion of each gaged by the upper end of a spring 39. the

lower end of which is attached to a hook secured to the side wall of thetank. The hook 40 may be adj ustably secured to the wall of the tank sothat the strain of the spring 39 upon the lever 36 may be varied asdesired. The springs 39 and the levers 36 serve to exert a downwardpressure upon the rods 28 that sustain the bowl, thus insuring a firmpressure of the knives b of the bowl against the knives of the plate.

While provision may be made for adj usting the nuts 34: individually, Iprefer to provide means whereby these nuts may be adjusted in unison andat a single operation. To this end, each nut is shown as provided at itstop with sprocket teeth 34 and the body of one of the nuts is formedwith ratchet teeth 34" that extend vertically around its eriphery. Thisnut is formed with an annu ar shoulder over which sets the annular hub 3l of an adjusting hand lever 34. This hand lever 34 carries a springactuated pawl 34 that engages the ratchet teeth 34". Around the sprocketteeth 34 of the several nuts extends a sprocket chain S that extendsalso around a tightening pulley T. As shown, the pulley T is mounted ina yoke T adjustably mounted on the top 0 of the tank. The shank t of theyoke T is shown as provided with slots through which pass the bolts 25'and through the upturned end i of the yoke shank t passes ,a tighteningscrew t t e opposite end of which passes through a bracket 25* attachedto the top of the tank. The opposite end of the screw i is provided witha corresponding threaded nut t By the means last descrlbed, it will beseen that by operating the hand lever 34, an adjustment of all the rods28 may be simultaneously effected, to insure a uniform vertical movementof the bowl B.

The knives b of the bowl (see Fig. 7) are arranged in a series of groupsaround the bottom of the bowl and these knives extend, with respect tothe radius of the bowl and the plate, at an angle opposite the angle atwhich the knives of the plate are arranged, thus giving a bettershearing action to the knives. Between the series of groups of knives atthe bottom of the bowl are formed the channels or open spaces 6 (seeFig. 7 through which pulp may pass'outwardly between the bowl and theplate. By thus forming the bowl with a series of groups of knives,instead of a continuous annular set of knives as on the plate, the freerand more effective circulation of the pulp between the knives isinsured. The groups of knives at the bottom of the bowl should be formedof a hard material, such for example, as hardened steel, and should bedetachably connected to the body of the bowl, and similarly, the annularseries of knives on the plate may be formed of segmental hard metalplates detachably connected to the peripheral portion of the plate. Inthe to c of the tank is formed an opening (closed y a lid when required)throu h which the stock or pulp to be beaten may be delivered into thebowl B.

To the bottom of the tank C, and preferably beneath the plate A, isconnected an inlet pipe 50 by which Water will be admitted to the tank,andadjacent the outer wall of the tank is formed a discharge openingadapted to be closed by a suitable valve, such for example, as a poppetvalve 51, to which opening will be connected a pipe 52 for the dischargeof the pulp from the tank. ,The valve 51 may be conveniently operated bya stem 53 passing through the discharge pipe 52.

From the foregoing description, the operation of my improved beater willbe seen to be as follows: Water will be admitted through the inlet pipe50 to the tank C until the water reaches a level somewhat above the toof the bowl B. Before the water is thus a Initted, however, the bowlshould be raised somewhat by means of the adjusting nuts 34 so that asthe water passes into the tank it will flow between and around theknives of the bowl and of the plate and thus free them from any pulpthat may have lodged thereon. While the water is thus delivered to thetank C, rotation may be imparted to the plate A and the operator maybegin to deliver the paper stock to the interior of the bowl through theopening in the top of the tank. The bowl will then be adjusteddownwardly by means of the nuts 34 until the knives of the bowl bearfirmly against the knives of the plate. As the plate is revolved, itsarms or blades a will impart a double circulation to the material withinthe tank. That is to say, these arms will cause the material within thebowl to circulate outwardly, upwardly and downwardly, as indicated bythe arrows in Fig. 2, and will cause a portion of the pulp to passbetween the knives of the plate and bowl and thence upwardly and overthe inwardly curved top of the bowl in downward direction. The arms orblades a will cause any masses or accumulations of pulp within the bowlto be circulated and repeatedly moved within the bowl until such massesare broken up and reduced to such condition as to pass freely betweenthe beater knives. This breaking up of any accumulations of pulp withinthe bowl is aided by the humps or offset portions 6 of the bowl, theinner ends of which extend in close proximity to the ends of the bladesor arms a, and cooperate with these blades or arms in cutting orshearing and elevating any stock that may have a tendency to lodgeadjacent Inn . the narrow opening between the knives. The

metal strips orribs 20 beneath the late A Wlll prevent the lodgment ofmaterial etween the plate A and the bottom of the tank, but beingpreferably provided on their outer ends with expanded inclined portions20 aid in the upward circulation of the material in the tank. My presentinvention-will be found adapted for the beating of paper pulp stocks ofwidely varying character and to possessmany advantages over the heatersnow in general use. In the forms of heaters most commonly employed inpaper mills, a very lar 'e per--' centage of the power used in drivingeaters is required for the elevation and circulation of the stock,whereas in my improved beater the power required for the clrculation ofthe stock is reduced to a minimum. Again, the construction andarrangement of the plate and bowl with their horizontally disposedknives, enable a most accurate adjustment of the knives to be securedand maintained. So, also, the time required for the beating operation inmy present machine is far less than that required in any other heaterswith which I am familiar, while the disintegration and hydration of thepulp is far more eiiectively accomplished. Again, the double circulationof the pulp, insuring as it does a thorough breaking up of any masses oraccumulations of stock before passing to the knives, avoids clogging theentrance to the knives andis attended with most important results. Itwill be noticed also that the shape of the bowl B, with its upper partextended inwardly to a considerable distance from its periphery, willaid in insurin a most efi'ec- Itgivelcirculation of the material Withinthe ow i I wish it understood that the details of construction above setforth may be varied without departing from the spirit of the inventionand that features of the invention may be employed without its adoptionas an entiret Havmg thus described my invention, what I claim as new anddesire to secure by Letters Patent is 1. A machine of the characterdescribed comprising a tank, a bowl within said tank and spaced from thewall thereof, said bowl having a bottom with an opening therein andprovided around said openin with a plurality of spaced and downwar lyprojecting beater knives, a platelocated beneath and closing the bottomopening of said bowl and provided with-beater knives arranged oppositethe knives of said bowl to cooperatetherewith and provide an entrancetherebetween for stock to be beaten, means for imparting rotation to thepart carrying one set of said knives,- and means for effecting an upwardcirculation to stock between the tank and bowl, and both an upward anddownward circulation to stock within the bowl to prevent the stockwithin the bowl from settling over and plugging the entrance to theknives.

2. A machine of the character described comprising a bowl having abottom opening and provided with outwardly pro ecting beater knives; apart located beneath the bottom of said bowl and provided with beaterknives arrangedoppositethe knives of said bowl; a receptacle forpulpsurrounding said knives and communicating with the top of said bowl;means for im arting rotation to one set of said knives an the partcarrying the same; and means located inside the series of beater knivesfor preliminarily breaking up accumulations of the paper stock and causo ing it to circulate within the bowl.

3. A machine of the character described" comprising a tank; a bowlwithin said tank and spaced at a distance from the wall thereof and openat its top and bottom and having its bottom provided with knives; and arotary plate extending beneath and closing the bottom of the bowl, saidplate havin knives for-cooperating with the knives of the bowl andhaving arms or blades on its top surface ada ted to impart circulationto material wit in the bowl. 7

4. A machine of the character described comprising a tank; a bowl withinsaid tank spaced at a distance from the wall thereof and open at its topand bottom and having its bottom provided with knives; and a rotaryplate extending beneath the bottom of the "bowl, said plate havingknives to cooperate -'with the knives of the bowl and having upon itsupper surface inclined arms or blades to impart circulation to materialwithin the bowl.

5. -A machine of the comprising a tank; a bowl, within said tank spacedat a distance from the wall thereof and open at its top and bottom andhaving its bottom provided with knives, the inner surface'of the bottomportion of the bowl being provided with humps or offsets; and a rotaryplate extending beneath the bottom ofthe bowl and having upon its uppersurface arms or blades adapted to cooperate with the humps or oflsets ofthe bowl.

6. A machine of the character described comprising a bowl having abottom opening and provided with outwardly pro ecting beater knives; aplate located beneath and closliln the bottom of said bowl and providedwit knives of said bowl; a receptacle for pulp surrounding said knivesand communicating with the top of said bowl; means for impartingrotation to one set of said knives and the part carrying the same; andmeans located inside the series ofbeater knives for preliminarilybreaking up accumulations of the paper stock.

7. A machine of the character described icharacter described 7 Inn aterknives arranged opposite the comprising a bowl having top and bottomopenings and provided around its bottom opening with a plurality ofspaced and downwardly projecting beater knives, a plate located beneathand closing the bottom opening of said bowl and provided with beaterknives arranged opposite the knives of said bowl to cooperate therewithand provide an entrance therebetween for stock to be beaten, and areceptacle for pulp surrounding said knives and communicating with thetop openin of said bowl, the part carr ingone set of said knives beingrotatable an having means.

for imparting an upward circulation to the stock from saidreceptacle tosaid bowl and both an upward and downward circulation to stock withinthe bowl to prevent the stock from settling over and plugging theentrance -to the knives.

8. A machine of the character described comprising a tank; a stationarybowl within said tank and s aced at a distance from the wall thereof,said bowl having its outer wall extending outwardly and upwardly andthen inwardly to a considerable distance from the periphery of the bowland provided at its ottom with knives; and a rotary plate extendingbeneath the bowl and closing its bottom, said plate having knivesadjacent its periphery to cooperate with the knives of the bowl, saidrotary plate also cooperating with the inwardly extending portions ofsaid bowl for efiecting circulation within the bowl of stock therein.

9. A machine of the character'described comprising a tank; a bowllocated within said tank and spaced from the wall thereof, said bowlhaving outwardly projecting beater knives about abottom opening thereinand a top portion extending inwardly to a considerable distance from itsperiphery; a plate located beneath and closing the bottom opening ofsaid bowl and provided with beater knives arranged opposite the knivesof said bowl; means for imparting rotation to one set of said knives andthe. part carrying the same; and means located inside the series ofbeater knives for imparting a centrifugal movement to the pulp to forceit between'the knives and also to force the stock to circulate invertical direction within the bowl.

10. A machine of the character described comprising a tank, a broad andrelatively shallow bowl within said tank and spaced at a distance fromthe wall thereof, said bowl having its wall inclined outwardly andupwardly and then inwardly and provided at its bottom with a centralaperture and beater knives arranged about said opening and projectingdownwardly from the bottom, a rotary plate extending beneath the bowland having its central portion projecting upwardly through said aperturea considerable distance above the bottom of the bowl and having itsupper surface downwardly and outwardly inclined from the center towardsthe edge of the bottom around said aperture so as to constitute, ineffect, a centrally upwardly projecting bottom for the bowl adapted tofacilitate circulation within the bowl of stock therein, said rotaryplate also being provided with beater knives arranged opposite theknives of the bowl and adapted to cooperate with said knives of thebowl.

11. In a machine of the class described, a tank, a bowl within said tankand spaced from the wall thereof, said bowl being open at'both its topand bottom, a rotary plate disposed at the bottom of said bowl andforming a closure for the bottom opening, a plurality of paddle membersextending from the edge of said plate and adapted to effect circulationof the stock in said tank.

12.- A machine of the character described comprising a tank; a bowlwithin said tank and spaced at a distance from the wall thereof and openat the top and bottom and having its bottom provided with outwardlyprojecting knives; a rotary plate extending beneath the bottom of thebowl and having knives adjacent its periphery to cooperate with theknives of the bowl; and adjusting means connected with the bowl at atleast three points around its periphery, whereby said bowl may beuniformly raised and lowered by a single operation, and each of theconnections being capable of being inde endently adjusted.

13. A machine 0 the character described comprising a tank; a bowl withinsaid tank and spaced at a distance from the wall thereof and open at thetop and bottom and having its bottom provided with outwardly projectingknives; a rotary plate extending beneath the bottom of the bowl andhaving knives adjacent its periphery to cooperate with the knives of thebowl; and adjusting means connected with the periphery of said bowl,said adjusting means comprising vertically adjgsttitble rods and elasticcushions for the 14:. A machine of the character described comprising atank; a bowl within said tank and spaced at a distance from the sidewall thereof and havin an open bottom provided with knives extending inoutward direction; a revoluble plate extending beneath the bottom of thebowl and having knives adjacent its periphery to cooperate with theknives of the bowl; adjusting means 'connected with the bowl at at leastthreepoints each of which connections is capable of being independentlyadjusted; and connecting means uniting the several adjusting means ofthe bowl for conjoint operation.

15. A machine of the character described comprising a tank; a stationarybowl within said tank and spaced from the-wall thereof,

of said bowl and provided with beater knives arranged opposite theknives of said bowl; ribs upon the under side of said plate for forcingoutwardly the material between the bottom of the plate and the tank; andmeans for imparting rotation to said plate.

16. A machine of the character described comprising a tank, a bowlwithin said tank and spaced from the vwall thereof, and open at the topand bottom and having its bottom provided with outwardly projectingknives, a rotary plate extending beneath the bottom of the bowl andhaving knives adjacent its periphery to cooperate with the knives of thebowl, and adjusting means connected with said bowl comprising verticallyadjustable gods1 and elastic cushions for supporting the ow e 17. Amachine of the character described comprising a tank, a bowl within saidtank and spaced from the wall thereof, a rotary member disposed at thebottom of said bowl,

beater members on said bowl and said rotary member adapted to cooperatewith each other when said rotary member is rotated to beat material fedinto the bowl, cushion means for supporting said bowl within said tankand means for adjusting the beater members on the bowl with respect tothe beater members on the rotary member.

18. A beater for paper stock comprising a receptacle, a bowl within andspaced from the Wall of said receptacle and having top and bottomopenings and an inner surface sloping upwardly and outwardly from theedge of said bottom opening, a rotatable beater disk beneath said bowl,said bowl and disk having cooperating sets of knives, and means forforcing the stock outwardly through said sets of knives and alsooutwardly and upwardly over the inner surface of the bowl.

19. Abeater for paper stock comprising a receptacle, a bowl within andspaced from the wall of said receptacle and having top and bottomopenings and a wall sloping outwardly from the edges of said top andbot-tom openings, toward the mid-portion thereof, and a rotatable beaterdisk beneath said bowl, said disk and bowl having cooperating sets ofknives and said disk having blades vprojecting upwardly into the bottomopening of the'bowl for forcing the stock outwardly between said sets ofknives and also outwardly and upwardly over the inner surface of thebowl.

CHARLES R. SEABORNE.

